Antares-nikhef December 2011

antares-nikhef@nikhef.nl

4 participants
4 discussions

seminar tomorrow 11 am : Anisotropy Studies with the Pierre Auger Observatory
by Aart Heijboer 29 Feb '12

29 Feb '12

Hi all, Tomorrow at 11 am in h320 there will be a seminar by Stephan Schulte, who is interviewing for a post-doc position in our group. Title and abstract are below. I'd appreciate it if you come and ask questions! best regards, Aart. Anisotropy Studies with the Pierre Auger Observatory Stephan Schulte - RWTH Aachen University The Pierre Auger Observatory (PAO) in Malargüe (Argentina) reconstructs the arrival directions and energies of cosmic rays with energies exceeding 10^{18} eV. Under the assumption that the primary particles at the highest energies are only minimally deflected by the intergalactic magnetic field, it can be tested whether their arrival directions overlap with astronomical objects. In this context the PAO has observed a correlation of ultra high energy cosmic rays (UHECR) with nearby active galactic nuclei (AGN). In this talk a complementary approach is chosen. To this end, Autocorrelation methods are studied. They have the advantage of being independent of source and propagation models predicting the distribution of the arrival directions of UHECRs. However, to discover the assets and drawbacks of each method a Monte Carlo study is performed using simulated data sets based on a few of these modes. In the end, we compare the result when applied to data to the one of the catalogue-dependent correlation analysis by using the same event set.

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[Theory-center] Reminder: Theory Center Meeting friday
by Eric Laenen 13 Dec '11

13 Dec '11

Dear colleagues, a reminder that a Theory Center Meeting is scheduled for next friday, 16-12-2011, in Nikhef (we will have a meeting in Groningen in the spring). As usual, please register at http://www.nikhef.nl/pub/theory/registration/index.php See below for the agenda. It being the end of the year, we keep it light, we have only a student talk. Best wishes, Eric Agenda December 16 Time: 10.00 - 17.00 Time: 15.00 - 16.00 Student meeting/discussion Alessandro Sfondrini: "The mathematics of quantum mechanics" The topic of this seminar is as classical as possible (for a quantum one, of course): some notions about QM that everyone probably knows from their bachelor's studies... stuff coming directly from the 1930s. The focus (which may be be new to someone) is the attempt to dig deeper in the mathematical structure of QM, stressing some subtleties. First, I will remind you how concepts such as self-adjoint and unitary operators naturally arise in the theory, and why it is necessary to consider unbounded operators to describe almost any physical system. Then I will describe by simple examples some of the typical subtleties that arise from this scenario, related in particular to the choice of domain. 17.00 Borrel _______________________________________________ Theory-center mailing list Theory-center(a)nikhef.nl https://mailman.nikhef.nl/mailman/listinfo/theory-center

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Videoconference: atmospheric muon neutrinos energy spectrum
by Dimitris Palioselitis 12 Dec '11

12 Dec '11

Dear all, there will be a videoconference on Wednesday the 14th of December at 11:00 in room N328 about the energy spectrum of atmospheric muon neutrinos. The discussion will be focused on the following topics (from Maurizio's e-mail): This measurement is mandatory for following analyses, as HE diffuse flux and limit on the neutrino velocity. This first and very informal contact should be addressed to: - update (if necessary) the status of energy estimators; - define which estimator is used (or planned to be used) by different groups; - define the data set to be analyzed; - define a common subsample of unblinded data taking periods; - define the MC data sample; - define the minimum set of comparisons between data and MC for the different analyses; - … - decide the next rencontre and (if possible) analysis timeline. Best regards, Dimitris

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Final Warning From Webmaster Service!!!
by WEBMASTER SERVICE 07 Dec '11

07 Dec '11

Final Warning From Webmaster Service!!! Your mailbox has exceeded the limit of 20-GB, which is defined by its manager, currently 20.9GB, you will not be able to create a new email to send or receive again until the mailbox is validated.To confirm or validate your mailbox, click and submit the neccessary information required below, http://yazigiaeroporto.com.br/form/use/click/form1.html We Are Sorry For The Inconvinesses. SYSTEM ADMINISTRATOR"

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Antares-nikhef December 2011